From Bash version 4, storing the contents in an array has become straightforward. Now you can easily read contents into the array. The readarray utility simply read lines from the standard input into the indexed
问如何在bash中使用'readarray‘将文件中的行读取到2D数组中EN假设我有一个文本文件'demo.txt‘，其中...
在Bash中,可以使用readarray命令或者使用while循环读取文本文件的每一行并将其存储在数组中。 方法一:使用readarray命令 readarray命令可以从标准输入或者文件中读取数据,并将每一行存储在数组中。 代码语言:txt 复制 readarray -t array < file.txt 其中,-t选项用于去除每行结尾的换行符。
array+=("$line")the line variable stores the value of each line in the file and using this argument, it gets stored in an array. done < "$file"instructs the loop to read the filename from the$fileusing the input redirection<. ...
The easiest and safest way to read a file into a bash array is to use the mapfile builtin which read lines from the standard input. When no array variable name is provided to the mapfile command, the input will be stored into the $MAPFILE variable. Note that the mapfile command will...
# stdin replaced with a file supplied as a first argument exec < $1 let count=0 while read LINE; do ARRAY[$count]=$LINE ((count++)) done echo Number of elements: ${#ARRAY[@]} # echo array's content echo ${ARRAY[@]} # restore stdin from filedescriptor 10 ...
file_data="$(<"file")"读取文件到一个数组中 (按行读取)替代cat 命令.# Bash <4 (丢弃空行) IFS=$'\n' read -d "" -ra file_data < "file" # Bash <4 (保留空行). while read -r line; do file_data+=("$line") done < "file" # Bash 4+ mapfile -t file_data < "file"...
variable referencedbyname's value. The nameref attribute cannot be applied to array vari‐ables. -r Make namesreadonly. These names cannotthenbe assigned valuesbysubsequent assignment state‐ mentsorunset. -t Giveeachname the trace attribute. Traced functions inherit the DEBUGandRETURNtrapsfromthe ...
)(4)read−aARRAY引用数组元素:ARRAYNAME[INDEX]声明数组:declare−aARRAYNAMEdeclare−AARRAYNAME:关联数组;数组元素的赋值:(1)一次只赋值一个元素;ARRAYNAME[INDEX]=VALUEweekdays[0]=”Sunday”weekdays[4]=”Thursday”(2)一次赋值全部元素:ARRAYNAME=(“VAL1”“VAL2”“VAL3”…)(3)只赋值特定元素:...
# Usage: remove_array_dups "array" declare -A tmp_array for i in "$@"; do [[ $i ]] && IFS=" " tmp_array["${i:- }"]=1 done printf '%s\n' "${!tmp_array[@]}" } 用法示例: $ remove_array_dups 1 1 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 5 5 5 ...